This is blackbox-0.51.3.1, a lean and clean X11 window manager.

Title:                  Blackbox
Version:                0.51.3.1
Description:            An X Window manager written from scratch in C++.
                        Includes shaped icons, floating menus, multiple
                        workspaces, its own graphics class and X resource
                        configuring scheme.
Keywords:               blackbox X xfree window manager c++
Author:                 bhughes@arn.net (Brad Hughes)
Primary-site:           ftp.arn.net /pub/linux
Copying-policy:         GPL version 2.0 (copy of license included with source)